Re: [PATCH] serial: 8250: Add cpufreq support
From: Alan Cox
Date: Thu Apr 12 2012 - 05:45:36 EST
> > > I will have a look at this and add the lock if necessary.
> >
> > At the very least you need reference counts held on the tty struct and to allow for the tty having vanished under you.
> >
>
> I am planning to add "tty->termios_mutex" lock. Any comments ?
Explain how this will help. You need a reference count to the tty itself.
> I understand this and planning to avoid unnecessary registration like these.
> As a solution, UART port's cpu freq status will be sent from the board file.
> Adding a member to the structure "plat_serial8250_port" which says whether
> a port requires cpu freq registration or not. cpu freq register function is
> called in the driver depending upon the status of this structure member.
> I can update the patch accordingly and send out a version 2 to the list.
That sounds sensible.
Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/